No, I show it in this chart:
The “brown out voltage” at the bottom is how low the output from the solar panel vent.
The cyan dots shows what happens during the low voltage and the red dots show what happens when the voltage returns to full again.
On the PB2S the red dots are at full current all the time. It do not matter if it was a small or large voltage drop, it will resume full current again when it is over.